WO2021015116A1 - 可変容量圧縮機の制御弁 - Google Patents

可変容量圧縮機の制御弁 Download PDF

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Publication number
WO2021015116A1
WO2021015116A1 PCT/JP2020/027782 JP2020027782W WO2021015116A1 WO 2021015116 A1 WO2021015116 A1 WO 2021015116A1 JP 2020027782 W JP2020027782 W JP 2020027782W WO 2021015116 A1 WO2021015116 A1 WO 2021015116A1
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WO
WIPO (PCT)
Prior art keywords
valve
chamber
hole
passage
control valve
Prior art date
Application number
PCT/JP2020/027782
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English (en)
French (fr)
Japanese (ja)
Inventor
田口　幸彦
Original Assignee
サンデン・オートモーティブコンポーネント株式会社
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Application filed by サンデン・オートモーティブコンポーネント株式会社 filed Critical サンデン・オートモーティブコンポーネント株式会社
Priority to CN202080051559.0A priority Critical patent/CN114080502B/zh
Publication of WO2021015116A1 publication Critical patent/WO2021015116A1/ja

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
    • F04B27/08—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis
    • F04B27/14—Control
    • F04B27/16—Control of pumps with stationary cylinders
    • F04B27/18—Control of pumps with stationary cylinders by varying the relative positions of a swash plate and a cylinder block
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
    • F04B27/08—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis
    • F04B27/10—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis having stationary cylinders
    • F04B27/12—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis having stationary cylinders having plural sets of cylinders or pistons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/02—Lubrication
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/22—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F16K1/52—Means for additional adjustment of the rate of flow
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K27/00—Construction of housing; Use of materials therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K47/00—Means in valves for absorbing fluid energy
    • F16K47/08—Means in valves for absorbing fluid energy for decreasing pressure or noise level and having a throttling member separate from the closure member, e.g. screens, slots, labyrinths

Definitions

  • the present invention relates to a control valve used in a variable displacement compressor.
  • the control valve for a variable displacement compressor described in Patent Document 1 is known.
  • the control valve for the variable displacement compressor controls the amount of refrigerant introduced from the discharge chamber of the variable capacitance compressor into the crank chamber to change the discharge capacity of the refrigerant from the variable capacitance compressor.
  • the valve body opens and closes a refrigerant passage (valve hole) communicating with the discharge chamber and the crank chamber.
  • the valve seat forming member is formed with a valve seat to which the valve body is separated and contacted, the valve hole, and a through hole as a communication passage communicating between the discharge chamber side and the crank chamber side.
  • the through hole as the communication passage communicating with the discharge chamber side and the crank chamber side, in other words, the penetration as a communication passage communicating with two different pressure regions.
  • the hole is a hole having a small cross-sectional area, specifically, a hole having a diameter of less than 1 mm. In order to form such a small hole accurately and efficiently, it is necessary to use a special tool or a special equipment, which has been a factor of cost increase.
  • the present invention makes it possible to easily form the communication passage in a control valve having two different pressure regions and having a communication passage having a small cross-sectional area as compared with the conventional case, whereby the control valve can be easily formed.
  • the purpose is to reduce the cost of.
  • a control valve used in a variable displacement compressor having a control pressure chamber that changes the state of the compression unit to change the discharge capacitance.
  • the control valve includes a valve body that opens and closes a valve hole that forms a part of a supply passage for supplying a refrigerant in the discharge chamber to the control pressure chamber, a valve chamber that houses the valve body, and the valve body.
  • a first urging portion that gives an urging force in the valve opening direction, a second urging portion that gives an urging force in the valve closing direction to the valve body, the valve chamber or the same first pressure region as the valve chamber, and the said It has a communication passage that communicates with a second pressure region different from the valve chamber.
  • the valve chamber is formed by joining the first member and the second member.
  • the first member is provided so as to communicate with the valve hole, one end communicating with the second pressure region and the other end communicating with the valve chamber or the first pressure region, and constitutes a part of the communication passage.
  • the second member has an opposed end surface provided so as to face the other end of the communicating hole. Then, by joining the first member and the second member, a diaphragm having a cross-sectional area smaller than the cross-sectional area of the communication hole and forming a part of the communication passage is formed. ..
  • the communication passage for communicating the valve chamber or the same first pressure region as the valve chamber and the second pressure region different from the valve chamber is the communication hole formed in the first member and the communication hole. It includes a throttle formed by joining the first member and the second member.
  • the diaphragm is formed of two members, and it is relatively easy to reduce the cross-sectional area thereof. Therefore, it is possible to easily form the communication passage as compared with the case where the communication passage is formed by one hole as in the conventional case, and thereby the cost of the control valve can be reduced.
  • FIG. 3 is a sectional view taken along the line AA of FIG.
  • FIG. 3 is a sectional view taken along the line AA of FIG.
  • FIG. 3 is a sectional view taken along the line AA of FIG.
  • FIG. 3 is a sectional view taken along the line AA of FIG.
  • FIG. 3 is a sectional view taken along the line AA of FIG.
  • FIG. 3 is a sectional view taken along the line AA of FIG.
  • FIG. 3 shows the modification of the said 2nd Embodiment of the said control valve.
  • It is sectional drawing of the main part which shows the 3rd Embodiment of the control valve is sectional drawing of the main part which shows the 4th Embodiment of the control valve.
  • FIG. 1 is a cross-sectional view showing a schematic configuration of a swash plate type variable displacement compressor to which a control valve according to the present invention is applied.
  • This variable displacement compressor is configured as a clutchless compressor mainly applied to air conditioning systems for vehicles.
  • the variable displacement compressor 100 includes a cylinder block 101 in which a plurality of cylinder bores 101a arranged in an annular shape are formed, a front housing 102 provided on one end side (left end side in FIG. 1) of the cylinder block 101, and a cylinder block 101.
  • the cylinder head 104 is provided on the other end side (right end side in FIG. 1) via the valve plate 103.
  • the cylinder block 101, the front housing 102, the valve plate 103, and the cylinder head 104 are fastened by a plurality of through bolts 105 to form a compressor housing.
  • a crank chamber 140 formed by the cylinder block 101 and the front housing 102 is provided in the compressor housing.
  • a center gasket is arranged between the front housing 102 and the cylinder block 101, and a cylinder gasket and suction are provided between the cylinder block 101 and the cylinder head 104 in addition to the valve plate 103.
  • a valve forming plate, a discharge valve forming plate and a head gasket are arranged.
  • the variable capacitance compressor 100 has a drive shaft 110.
  • the drive shaft 110 extends horizontally through the crank chamber 140.
  • a swash plate 111 is arranged in the middle portion of the drive shaft 110 in the axial direction.
  • the swash plate 111 is connected to a rotor 112 fixed to the drive shaft 110 via a link mechanism 120.
  • the swash plate 111 rotates together with the drive shaft 110. Further, the angle of the drive shaft 110 of the swash plate 111 with respect to the plane orthogonal to the axis (center line) O (hereinafter referred to as "tilt angle of the swash plate 111”) can be changed.
  • the link mechanism 120 rotates with respect to the first arm 112a projecting from the rotor 112, the second arm 111a projecting from the swash plate 111, and one end side with respect to the first arm 112a via the first connecting pin 121.
  • the swash plate 111 is formed with a shaft insertion hole 111b through which the drive shaft 110 is inserted.
  • the shaft insertion hole 111b is formed so that the swash plate 111 can be tilted within a range of a maximum tilt angle and a minimum tilt angle.
  • a minimum tilt angle regulating portion is formed in the shaft insertion hole 111b.
  • the drive shaft 110 includes a tilt angle reducing spring 114 that urges the swash plate 111 in a direction that reduces the tilt angle of the swash plate 111, and a tilt angle increasing spring 115 that urges the swash plate 111 in a direction that increases the tilt angle of the swash plate 111. And are installed.
  • the tilt angle reducing spring 114 is arranged between the swash plate 111 and the rotor 112, and the tilt angle increasing spring 115 is mounted between the swash plate 111 and the spring support member 116 fixed to the drive shaft 110.
  • the urging force of the tilt angle increasing spring 115 is set to be larger than the urging force of the tilt angle decreasing spring 114. Further, when the drive shaft 110 is not rotating, the swash plate 111 is positioned at an inclination angle in which the urging force of the tilt angle decreasing spring 114 and the urging force of the tilt angle increasing spring 115 are balanced.
  • One end side (the left end side in FIG. 1) of the drive shaft 110 penetrates the inside of the boss portion 102a of the front housing 102 and extends to the outside of the front housing 102.
  • a power transmission device (not shown) is connected to the one end of the drive shaft 110.
  • a shaft sealing device 130 is provided between the drive shaft 110 and the boss portion 102a.
  • the connection between the drive shaft 110 and the rotor 112 is supported by the first bearing 131 attached to the front housing 102 and the second bearing 132 attached to the cylinder block 101 in the radial direction, and is supported by the second bearing 132 attached to the cylinder block 101 in the thrust direction. It is supported by a third bearing 133 arranged between the inner surface and the rotor 112 and a thrust plate 134 attached to the cylinder block 101.
  • the gap between the other end of the drive shaft 110 (the right end in FIG. 1) and the thrust plate 134 is adjusted to an appropriate value by the adjusting screw 135.
  • the drive shaft 110 rotates in synchronization with the rotation of the power transmission device by transmitting the power from the external drive source to the power transmission device.
  • a piston 136 is housed in each cylinder bore 101a.
  • Each piston 136 has a protruding portion 136a protruding into the crank chamber 140.
  • a storage space is formed in the projecting portion 136a, and the outer edge portion of the swash plate 111 and its vicinity are housed in this storage space via a pair of shoes 137.
  • Each piston 136 reciprocates in the corresponding cylinder bore 101a by rotating the swash plate 111 with the rotation of the drive shaft 110.
  • the cylinder head 104 is formed with a suction chamber 141 and a discharge chamber 142.
  • the suction chamber 141 is arranged substantially in the center of the cylinder head 104.
  • the discharge chamber 142 is provided so as to surround the suction chamber 141 in an annular shape.
  • the suction chamber 141 and each cylinder bore 101a are connected to each other via a suction hole 103a penetrating a valve plate 103 or the like and a suction valve (not shown) formed in the suction valve forming plate (not shown).
  • the discharge chamber 142 and each cylinder bore 101a are connected via a discharge hole 103b penetrating a valve plate 103 or the like and a discharge valve (not shown) formed in the discharge valve forming plate (not shown).
  • a muffler is provided on the upper part of the cylinder block 101.
  • the lid member 106 on which the discharge port 106a is formed and the muffler forming wall 101b formed on the upper part of the cylinder block 101 are fastened with bolts (not shown) via a seal member (not shown). Is formed by.
  • a discharge check valve 200 is arranged at the connection portion between the first continuous passage 144 and the muffler space 143.
  • the discharge check valve 200 operates in response to a pressure difference between the first continuous passage 144 (upstream side) and the muffler space 143 (downstream side). Specifically, the discharge check valve 200 closes the first passage 144 when the pressure difference is smaller than the predetermined value, and opens the first passage 144 when the pressure difference is larger than the predetermined value. It is configured in.
  • the first continuous passage 144, the discharge check valve 200, the muffler space 143, and the discharge port 106a form a discharge passage of the variable displacement compressor 100, and the discharge chamber 142 is a refrigerant of the air conditioner system through the discharge passage. It is connected to the circuit (high voltage side).
  • the suction chamber 141 is connected to (the low pressure side) of the refrigerant circuit of the air conditioner system (not shown) via a suction passage 104a formed in the cylinder head 104.
  • the refrigerant (on the low pressure side) of the refrigerant circuit of the air conditioner system is guided (flowed) into the suction chamber 141 through the suction passage 104a.
  • the refrigerant in the suction chamber 141 is sucked into the corresponding cylinder bore 101a by the reciprocating movement of each piston 136, compressed, and discharged to the discharge chamber 142. Therefore, in the present embodiment, a "compression unit" that sucks and compresses the refrigerant in the suction chamber 141 is mainly configured by the cylinder bore 101a and the piston 136.
  • the refrigerant discharged into the discharge chamber 142 (that is, the high-pressure refrigerant) is guided (outflowed) to the high-pressure side of the refrigerant circuit of the air conditioner system through the discharge passage.
  • the discharge check valve 200 prevents the refrigerant from flowing from the refrigerant circuit (on the high-pressure side) of the air conditioner system toward the discharge chamber 142 (that is, the backflow of the refrigerant).
  • the cylinder head 104 is provided with a control valve 300.
  • the control valve 300 is housed in a housing hole 104b formed in the cylinder head 104.
  • the control valve 300 has an internal passage that forms a part of a supply passage 145 for supplying the refrigerant in the discharge chamber 142 to the crank chamber 140.
  • the control valve 300 is configured to adjust the opening degree (passage cross-sectional area) of the internal passage (that is, the supply passage 145), thereby adjusting the supply amount of the refrigerant in the discharge chamber 142 with respect to the crank chamber 140. ing.
  • the supply passage 145 and the control valve 300 will be described later.
  • the crank chamber 140 communicates with the suction chamber 141 via the discharge passage 146 formed by the second communication passage 101c, the space portion 101d, and the throttle hole 103c. Therefore, the refrigerant in the crank chamber 140 flows (is discharged) to the suction chamber 141 through the discharge passage 146.
  • the space portion 101d is composed of a recess formed on the end surface of the cylinder block 101 on the cylinder head 104 side
  • the second communication passage 101c is a cylinder block so as to communicate the crank chamber 140 and the space portion 101d. It is formed in 101.
  • the throttle hole 103c is formed of a through hole having a small cross-sectional area that penetrates the valve plate 103 or the like so as to communicate the space 101d and the suction chamber 141.
  • control valve 300 can change the pressure of the crank chamber 140 by adjusting the opening degree of the internal passage (supply passage 145), whereby the tilt angle of the swash plate 111, that is, the stroke of the piston 136 can be changed.
  • the discharge capacity of the variable displacement compressor 100 can be changed by changing the pressure.
  • control valve 300 adjusts the supply amount of the refrigerant in the discharge chamber 142 with respect to the crank chamber 140 to change the pressure in the crank chamber 140, thereby reducing the pressure difference between the front and rear of each piston 136, that is, the piston 136.
  • the tilt angle of the swash plate 111 can be changed by utilizing the pressure difference between the compression chamber and the crank chamber 140 in the sandwiching cylinder bore 101a, and as a result, the stroke amount of the piston 136 changes and the discharge of the variable displacement compressor 100 is performed.
  • the capacity changes.
  • the crank chamber 140 changes the state of the compression unit (specifically, the stroke of the piston 136) according to the internal pressure to change the discharge capacitance of the variable capacitance compressor 100. It has a function to make it. Therefore, in the present embodiment, the crank chamber 140 corresponds to the "control pressure chamber" of the present invention.
  • Lubricating oil is sealed in the crank chamber 140.
  • the lubricating oil is agitated by the swash plate 111 and the like to form mist, and moves in the variable displacement compressor 100 together with the refrigerant.
  • the mist-ized lubricating oil circulates together with the refrigerant in the internal circulation path formed by the crank chamber 140, the discharge passage 146, the suction chamber 141, the cylinder bore 101a, the discharge chamber 142, and the supply passage 145.
  • the inside of the variable displacement compressor 100 is lubricated.
  • the supply passage 145 will be described.
  • four O-rings 300a to 300d are attached to the outer peripheral surface of the control valve 300 at intervals from each other. Then, the inside of the accommodating hole 104b is blocked from the outside by these four O-rings 300a to 300d, and the outside of the control valve 300 in the accommodating hole 104b is directed from the bottom side to the opening side of the accommodating hole 104b.
  • the first to third spaces S1 to S3 that are isolated from each other are partitioned.
  • the first space S1 communicates with the suction chamber 141 via a third passage 104c formed in the cylinder head 104.
  • the second space S2 communicates with the discharge chamber 142 via the fourth passage 104d formed in the cylinder head 104.
  • the third space S3 communicates with the crank chamber 140 via the fifth communication passage 104e formed in the cylinder head 104, the through hole 103d penetrating the valve plate 103, and the sixth communication passage 101e formed in the cylinder block 101. doing.
  • the internal passage of the control valve 300 connects the second space S2 and the third space S3.
  • the supply passage is provided by the fourth passage 104d, the second space S2, the internal passage of the control valve 300, the third space S3, the fifth passage 104e, the through hole 103d, and the sixth passage 101e. 145 is formed.
  • FIG. 2 is a cross-sectional view showing a first embodiment of the control valve 300.
  • the bottom side (left side in FIG. 2) of the accommodation hole 104b is referred to as "tip side”
  • the opening side (right side in FIG. 2) of the accommodation hole 104b is referred to as "rear end side”.
  • the control valve 300 includes a valve body 311, a cap member 312, a pressure sensitive device 320, a solenoid housing 331, a fixed iron core 332, a movable iron core 333, an accommodating member 334, and a coil.
  • the assembly 335 and the valve unit 340 are included.
  • the valve body 311 is formed in a substantially columnar shape.
  • the cap member 312 is formed in a bottomed cylindrical shape, and its opening side is fixed to the outer peripheral surface on the tip end side of the valve body 311.
  • the pressure sensitive chamber 313 is formed by the internal space of the cap member 312 and the circular recess 311a formed on the end surface of the valve body 311 on the distal end side.
  • the pressure sensitive chamber 313 communicates with the first space S1 through the first communication hole 312a formed on the side surface of the cap member 312.
  • the first space S1 communicates with the suction chamber 141 via the third communication passage 104c. Therefore, the pressure Ps of the suction chamber 141 acts on the first space S1 and the pressure sensitive chamber 313. That is, the first space S1 and the pressure sensitive chamber 313 belong to the region of the pressure Ps of the suction chamber 141 (hereinafter referred to as “suction chamber pressure region”).
  • a bottomed and circular first fitting hole 314 is formed on the end surface 311b on the rear end side of the valve body 311. Further, the valve body 311 has a circular valve hole 315 that opens in the center of the bottom surface of the first fitting hole 314 and extends in the length direction of the valve body 311 and a valve body from the valve hole 315 to the pressure sensitive chamber 313.
  • a first rod insertion hole 316 extending linearly in the length direction of the 311 and a second communication hole 317 communicating the first rod insertion hole 316 and the second space S2 are formed.
  • One end of the second communication hole 317 that opens on the outer peripheral surface of the valve body 311 is covered with a cylindrical filter member 318 attached to the outer peripheral surface of the valve body 311.
  • the pressure sensitive device 320 is arranged in the pressure sensitive chamber 313.
  • the pressure sensitive device 320 includes a bellows assembly 321.
  • the bellows assembly 321 is arranged in the bellows 321a, a bellows-shaped bellows 321a in which the front end side is closed and the rear end side is open, an end member 321b that closes the open portion on the rear end side of the bellows 321a. It is composed of a stopper member 321c that regulates the contraction of the bellows 321a, and a first urging member (compression coil spring) 321d that is arranged inside the bellows 321a and urges the bellows 321a in the extending direction.
  • a stopper member 321c that regulates the contraction of the bellows 321a
  • a first urging member (compression coil spring) 321d that is arranged inside the bellows 321a and urges the bellows 321a in the extending direction.
  • the pressure sensitive device 320 is a second urging member (compression coil spring) which is arranged between the end member 321b and the valve body 311 and urges the bellows 321a in the direction of contraction in addition to the bellows assembly 321. It also has 321e.
  • the inside of the bellows 321a is a vacuum, and the bellows 321a expands and contracts in response to the pressure of the pressure sensitive chamber 313 (that is, the pressure Ps of the suction chamber 141). Specifically, the bellows 321a extends as the pressure in the pressure sensitive chamber 313 (pressure Ps in the suction chamber 141) decreases.
  • the solenoid housing 331 is provided on the rear end side of the valve body 311.
  • the solenoid housing 331 has a cylindrical peripheral wall portion 331a and an end wall portion 331b fixed to an end portion (end portion on the valve body 311 side) on the distal end side of the peripheral wall portion 331a by caulking or the like.
  • the peripheral wall portion 331a is formed of, for example, a magnetic steel plate
  • the end wall portion 331b is formed of, for example, magnetic free-cutting steel.
  • the fixed iron core 332 has a cylindrical shaft-shaped small diameter portion 332a and a bottomed cylindrical large diameter portion 332b that is connected to the tip end side of the small diameter portion 332a and has a larger diameter than the small diameter portion 332a.
  • the small diameter portion 332a is formed with a second rod insertion hole 332c that penetrates from the end surface on the rear end side to the internal space of the large diameter portion 332b.
  • the fixed iron core 332 is made of, for example, magnetic free-cutting steel.
  • the small diameter portion 332a of the fixed iron core 332 is housed in the solenoid housing 331.
  • the rear end side portion (that is, the portion on the small diameter portion 332a side) is the end surface on the tip end side of the end wall portion 331b of the solenoid housing 331 (that is, the end surface on the valve body 311 side) 331c. It is fitted into a bottomed and circular second fitting hole 331d formed in the center of the above, and the remaining tip side portion protrudes from the tip end side end surface 331c of the end wall portion 331b of the solenoid housing 331.
  • the large diameter portion 332b of the fixed iron core 332 has a fitting portion 331b1 fitted in the second fitting hole 331d formed in the solenoid housing 331, and a protruding portion 331b2 protruding from the solenoid housing 331.
  • the large diameter portion 332b is formed in a bottomed cylindrical shape, and the protruding portion 331b2 has the internal space and has an annular end surface 332b21 on the tip end side.
  • the protruding portion 332b2 of the large diameter portion 332b of the fixed iron core 332 is fitted with the first fitting hole 314 whose tip side portion 332b22 is formed in the end surface 311b on the rear end side of the valve body 311. Further, the end surface 332b21 on the tip end side of the protruding portion 332b2 of the large diameter portion 332b of the fixed iron core 332 (hereinafter, simply referred to as "end surface 332b21 on the tip end side of the fixed iron core 332") abuts on the bottom surface of the first fitting hole 314. There is. As a result, the internal space of the protrusion 332b2 is partitioned to form the valve chamber 336.
  • the valve chamber 336 is partitioned by joining the valve body 311 and the fixed iron core 332.
  • the valve chamber 336 is a portion on the inner peripheral surface of the first fitting hole 314 formed in the valve body 311 on the tip end side of the outer peripheral surface of the large diameter portion 332b (protruding portion 332b2) of the fixed iron core 332.
  • the partition is formed by fitting 332b22 (hereinafter, simply referred to as "the tip side portion 332b22 of the fixed iron core 332").
  • the valve chamber 336 communicates with the second space S2 via the valve hole 315 and the second communication hole 317 formed in the valve body 311. Further, the valve chamber 336 communicates with the third space S3 through the third communication hole 332b23 formed on the side surface of the protruding portion 332b2. That is, the second space S2 and the third space S3 are communicated (connected) by the second communication hole 317, the valve hole 315, the valve chamber 336, and the third communication hole 332b23.
  • the internal passage of the control valve 300 connecting the second space S2 and the third space S3 by the second communication hole 317, the valve hole 315, the valve chamber 336, and the third communication hole 332b23. Further, the internal passage of the control valve 300 forming a part of the supply passage 145 is formed. Further, the valve hole 315 forms a part of the supply passage 145.
  • discharge chamber pressure region the region of the pressure Pd of the discharge chamber 142
  • crank chamber pressure region the region of the pressure Pc of the crank chamber 140
  • the movable iron core 333 is arranged on the rear end side of the fixed iron core 332.
  • the movable iron core 333 is made of magnetic free-cutting steel like the fixed iron core 332.
  • the accommodating member 334 is made of a non-magnetic material and is formed in a bottomed cylindrical shape.
  • the opening side of the accommodating member 334 is held by the end wall portion 331b of the solenoid housing 331 in a state where the small diameter portion 332a of the fixed iron core 332 and the movable iron core 333 are accommodated.
  • the movable iron core 333 is slidably provided along the inner peripheral surface of the accommodating member 334, and is movable in the accommodation member 334 in the detaching direction with respect to the end surface on the rear end side of the fixed iron core 332.
  • a third urging member (compression coil spring) 337 is provided between the fixed iron core 332 and the movable iron core 333 to urge the movable iron core 333 in a direction away from the fixed iron core 332.
  • the coil assembly 335 includes a solenoid coil (hereinafter simply referred to as "coil") 335a and a closing member 335b.
  • the coil 335a is covered with resin and is arranged around the accommodating member 334.
  • the coil 335a is housed in a storage space formed inside the peripheral wall portion 331a of the solenoid housing 331.
  • the closing member 335b is a member that closes the rear end side of the peripheral wall portion 331a of the solenoid housing 331, and is made of, for example, magnetic free-cutting steel.
  • the closing member 335b is arranged so as to surround the movable iron core 333 on the outside of the accommodating member 334, and is integrated with the coil 335a by a resin.
  • Reference numeral 335c in FIG. 2 is a resin portion in the coil assembly 335.
  • the coil 335a is connected to a control device (not shown) provided outside the variable capacitance compressor 100 via a signal line or the like.
  • the control device is configured to control energization of the coil 335a.
  • the solenoid housing 331, the fixed iron core 332 (a part other than the protruding portion 332b2), the movable iron core 333 and the closing member 335b form a magnetic circuit, and the movable iron core 333 is attached to the third. It generates an electromagnetic force that moves toward the rear end surface of the fixed iron core 332 against the urging force of the urging member 337.
  • the valve unit 340 includes a valve body 341, a first rod 342, and a second rod 343.
  • the valve body 341, the first rod 342, and the second rod 343 are integrated to form the valve unit 340.
  • the valve body 341 is housed in the valve chamber 336 and opens and closes the valve hole 315. Specifically, the valve hole 315 is closed by abutting the end surface of the valve body 341 on the distal end side with the bottom surface of the first fitting hole 314 in which the valve hole 315 opens, and the first fitting hole 314 is said to have the same. The valve hole 315 is opened by separating from the bottom surface.
  • the first rod 342 is slidably inserted into the first rod insertion hole 316 formed in the valve body 311.
  • the tip end side of the first rod 342 protrudes into the pressure sensitive chamber 313 and is detachably connected to the end member 321b of the pressure sensitive device 320, and the rear end side of the first rod 342 is the valve hole 315 and the first. It is formed to have a diameter smaller than that of the rod insertion hole and is connected to the end face on the tip end side (end face on the valve hole 315 side) of the valve body 341.
  • the second rod 343 is inserted into the second rod insertion hole 332c formed in the small diameter portion 332a of the fixed iron core 332 with a gap.
  • the tip end side of the second rod 343 is connected to the rear end side of the valve body 341, and the other end of the second rod 343 is connected to the movable iron core 333. That is, the valve unit 340 is integrated with the movable iron core 333, and moves with the movement of the movable iron core 333.
  • the bellows 321a expands and contracts in response to the pressure of the pressure sensitive chamber 313 (that is, the pressure Ps of the suction chamber 141).
  • the end member 321b abuts and presses against the other end of the first rod 342 of the valve unit 340.
  • the valve unit 340 is urged in the direction in which the valve body 341 opens the valve hole 315.
  • the pressure sensitive device 320 is configured to apply an urging force in the valve opening direction to the valve unit 340 (valve body 341) in response to the pressure Ps of the suction chamber 141. Therefore, in the present embodiment, the pressure sensitive device 320 corresponds to the "first urging unit" of the present invention.
  • the solenoid housing 331, the fixed iron core 332 (a portion other than the protruding portion 332b2), the movable iron core 333, and the closing member 335b form a magnetic circuit, and the third urging is performed.
  • An electromagnetic force is generated to move the movable iron core 333 toward the rear end surface of the fixed iron core 332 against the urging force of the member 337.
  • the valve unit 340 is urged in the direction in which the valve body 341 closes the valve hole 315.
  • the solenoid portion that applies urging force in the valve closing direction to the valve unit 340 (valve body 341) mainly by the solenoid housing 331, the fixed iron core 332, the movable iron core 333, and the coil assembly 335 (coil 335a, closing member 335b).
  • the solenoid portion corresponds to the "second urging portion" of the present invention.
  • the control valve 300 When the energization of the coil 335a by the control device is turned off, the movable iron core 333 is held by the third urging member 337 in a state farthest from the fixed iron core 332 by the urging force.
  • the valve body 341 of the valve unit 340 opens the valve hole 315 (that is, the supply passage 145) to the maximum. Therefore, in the variable displacement compressor 100, the refrigerant in the discharge chamber 142 is supplied to the crank chamber 140, and the pressure in the crank chamber 140 rises to a value close to the pressure Pd in the discharge chamber 142. Therefore, the tilt angle of the swash plate 111 is minimized. As a result, the stroke of the piston 136 is minimized, and the variable displacement compressor 100 is operated with the minimum capacitance.
  • the valve body 341 of the valve unit 340 is supplied with the valve hole 315 (that is, by the electromagnetic force generated by the solenoid portion (the urging force in the valve closing direction). Close the passage 145). Therefore, in the variable displacement compressor 100, the refrigerant in the discharge chamber 142 is not supplied to the crank chamber 140. Further, since the refrigerant in the crank chamber 140 is discharged to the suction chamber 141 through the discharge passage 146, the pressure Pc in the crank chamber 140 drops to a value close to the pressure Ps in the suction chamber 141. Therefore, the tilt angle of the swash plate 111 is maximized. As a result, the stroke of the piston 136 is maximized, and the variable displacement compressor 100 is operated at the maximum capacitance.
  • the pressure Ps of the suction chamber 141 is the pressure corresponding to the energization amount (The opening degree of the valve hole 315 (that is, the supply passage 145) is adjusted by the valve body 341 of the valve unit 340 so as to reach the set pressure). Specifically, when the pressure Ps of the suction chamber 141 is lower than the set pressure, the valve body 341 of the valve unit 340 increases the opening degree of the valve hole 315, and the pressure Ps of the suction chamber 141 exceeds the set pressure.
  • the valve body 341 of the valve unit 340 reduces the opening degree of the valve hole 315. Therefore, the amount of the refrigerant supplied in the discharge chamber 142 to the crank chamber 140 is adjusted. That is, the variable capacitance compressor 100 is operated in the capacitance control state.
  • the supply passage 145 constitutes a part of the internal circulation path in which the mist-ized lubricating oil circulates together with the refrigerant.
  • the supply passage 145 also functions as a lubricating oil return passage for returning the lubricating oil to the crank chamber 140.
  • the valve body 341 of the valve unit 340 closes the valve hole 315 (that is, the supply passage 145)
  • the valve body 341 of the valve unit 340 closes the valve hole 315 (that is, the supply passage 145)
  • the valve body 341 of the valve unit 340 closes the valve hole 315 (that is, the supply passage 145)
  • the lubricating oil is cranked. It will not be possible to return to room 140.
  • a bypass passage for bypassing the valve hole 315 and allowing the refrigerant to flow to the crank chamber 140 is provided in the control valve 300, and the bypass passage provides the bypass passage regardless of whether the valve hole 315 is opened or closed. It is possible to return the lubricating oil to the crank chamber 140.
  • FIG. 3 which is an enlarged view of the main part of FIG. 2 and FIG. 4 which is a cross-sectional view taken along the line AA of FIG. 3, in the present embodiment, the second discharge chamber pressure region is located.
  • a seventh communication passage 400 that communicates the communication hole 317 and the valve chamber 336 in the crank chamber pressure region is provided as the bypass passage.
  • the seventh passage 400 in order to reduce the influence on the capacity control and the like in the variable capacitance compressor 100, it is necessary to sufficiently reduce the cross-sectional area of the seventh passage 400 as the bypass passage with respect to the cross-sectional area of the valve hole 315.
  • a seventh passage 400 is to be configured by one hole, a small hole having a diameter of less than 1 mm must be formed in the valve body 311, and as described above, the cost of the control valve 300 increases. To do. Therefore, the seventh passage 400 in the present embodiment is formed as follows, thereby preventing an increase in the cost of the control valve 300.
  • the valve body 311 is formed with a fourth communication hole 401 parallel to the valve hole 315.
  • the fourth communication hole 401 communicates the first fitting hole 314 and the second communication hole 317. Specifically, one end (tip side) of the fourth communication hole 401 opens into the second communication hole 317, and the other end (rear end side) of the fourth communication hole 401 is the peripheral edge of the bottom surface of the first fitting hole 314. It opens near the part.
  • the fourth communication hole 401 is formed as a hole having a size and shape that can be easily processed.
  • the fourth communication hole 401 is formed as a circular hole having a diameter of 1 mm or more and a cross-sectional area smaller than the cross-sectional area of the valve hole 315.
  • a first groove portion 402 is formed at a portion of the end surface 332b21 on the tip end side of the fixed iron core 332 facing the other end of the fourth communication hole 401.
  • the first groove portion 402 has a cross-sectional area smaller than the cross-sectional area of the fourth communication hole 401.
  • the first groove portion 402 has a cross-sectional area sufficiently smaller than the cross-sectional area of the valve hole 315.
  • the first groove portion 402 extends in the radial direction, and when the valve body 311 and the fixed iron core 332 are joined to each other and the end surface 332b21 on the tip end side of the fixed iron core 332 comes into contact with the bottom surface of the first fitting hole 314.
  • a throttle (hereinafter referred to as "first throttle”) is provided between the valve chamber 336 and the other end of the fourth communication hole 401 and communicates with the valve chamber 336 and the other end of the fourth communication hole 401. ..
  • the fourth communication hole 401 formed in the valve body 311 and the first groove portion 402 formed in the end surface 332b21 on the tip end side of the fixed iron core 332 to form the first throttle make the seventh passage as the bypass passage.
  • a communication passage 400 is formed.
  • the fourth communication hole 401 and the first groove portion 402 (the first throttle) each form a part of the seventh communication passage 400.
  • the refrigerant in the discharge chamber 142 flows into the crank chamber 140 even when the valve hole 315 is closed, and lubrication is achieved.
  • the oil can be returned to the crank chamber 140. Therefore, the decrease of the lubricating oil held in the crank chamber 140 is suppressed, and as a result, the insufficient lubrication inside the variable displacement compressor 100 is also prevented.
  • the 7th communication passage 400 is formed by the 4th communication hole 401 formed in the valve body 311 and the 1st groove portion 402 formed in the end surface 332b21 on the tip end side of the fixed iron core 332. ing. Therefore, if the cross-sectional area of the first groove portion 402 is sufficiently smaller than the cross-sectional area of the valve hole 315, that is, if the first groove portion 402 is formed so as to function as a throttle, the fourth communication hole 401 is formed. Even if the hole is relatively large, it is possible to suppress the influence of the seventh communication passage 400 on the capacity control and the like in the variable displacement compressor 100.
  • the seventh passage 400 as the bypass passage in the present embodiment can be formed without using a special tool or special equipment, and is a seventh passage as compared with the case where it is composed of one hole. The cost for forming the communication passage 400, and thus the cost for the control valve 300, is reduced.
  • valve body 311 corresponds to the "first member” of the present invention
  • the fixed iron core 332 corresponds to the “second member” of the present invention
  • the end face 332b21 on the tip end side of the fixed iron core 332 of the present invention Corresponds to the "opposing end face”.
  • FIG. 5 is a cross-sectional view of a main part showing the second embodiment of the control valve 300.
  • the same reference numerals are used for the elements common to the first embodiment, and the description thereof will be omitted as appropriate.
  • different configurations will be mainly described.
  • the valve chamber 336 is provided in the valve body 311.
  • the valve body 311 is formed with a valve chamber forming hole 501 having a bottom and a circular cross section, which opens at the bottom surface of the first fitting hole 314.
  • a valve hole 315 is opened in the center of the bottom surface of 501.
  • a fifth communication hole 502 that communicates the valve chamber forming hole 501 and the third space S3 is formed, and a portion on the rear end side of the valve body 311 is formed in the solenoid housing 331. It is fitted in the fitting hole 503.
  • the large diameter portion 332b of the fixed iron core 332 does not have the protruding portion 332b2, and the large diameter portion 332b of the fixed iron core 332 is fitted into the first fitting hole 314 of the valve body 311 to be fitted to the tip end side of the fixed iron core 332.
  • the end surface 322b21 of the valve body 322b21 is in contact with the bottom surface of the first fitting hole 314, whereby the valve chamber forming hole 501 of the valve body 311 is partitioned to form the valve chamber 336.
  • the fourth communication hole 401 formed in the valve body 311 and the end surface 332b21 on the tip end side of the fixed iron core 332 are formed to form the first throttle.
  • the first groove portion 402 and the seventh communication passage 400 as the bypass passage are formed.
  • the first groove portion 402 constituting the first throttle may be provided on the valve body 311 side.
  • the first groove portion 402 is formed on the bottom surface of the first fitting hole 314 adjacent to the other end of the fourth communication hole 401.
  • FIG. 7 is a cross-sectional view of a main part showing a third embodiment of the control valve 300.
  • the same reference numerals are used for the elements common to the first and second embodiments.
  • configurations different from those of the first and second embodiments will be mainly described.
  • the fixed iron core 332 has a notch in which the peripheral edge portion of the end face 332b21 on the distal end side is cut out with a predetermined width over the entire circumference instead of the first groove portion 402. It has a portion 511 and a second groove portion 512 formed on an end surface 332b21 (a portion other than the notch portion 511) on the distal end side.
  • the second groove portion 512 extends in the radial direction and communicates between the internal space of the protruding portion 332b2 of the large diameter portion 332b and the cutout portion 511 (a space formed by cutting out the peripheral edge portion of the end surface 332b21 on the distal end side).
  • the second groove portion 512 has a cross-sectional area smaller than the cross-sectional area of the fourth communication hole 401, more specifically, a cross-sectional area sufficiently smaller than the cross-sectional area of the valve hole 315, like the first groove portion 402. ing.
  • the valve body 311 and the fixed iron core 332 are joined, that is, the portion 332b22 on the tip end side of the fixed iron core 332 is fitted into the first fitting hole 314, and the bottom surface of the first fitting hole 314 is fitted.
  • an annular passage 513 communicating with the other end of the fourth communication hole 401 is formed.
  • the annular passage 513 may have, for example, a cross-sectional area approximately equal to or smaller than the cross-sectional area of the fourth communication hole 401.
  • the second groove portion 512 has a valve chamber 336 and an annular passage 513 when the valve body 311 and the fixed iron core 332 are joined to each other and the end surface 332b21 on the tip end side of the fixed iron core 332 comes into contact with the bottom surface of the first fitting hole 314.
  • a throttle hereinafter referred to as "second throttle" is provided between the valve chamber 336 and the annular passage 513 to communicate with each other.
  • the fourth communication hole 401 formed in the valve body 311 and the notch 511 of the end surface 332b21 on the tip end side of the fixed iron core 332 form the peripheral edge of the bottom surface of the first fitting hole 314.
  • a seventh communication passage 400 as the bypass passage is formed by the formed annular passage 513 and the second groove portion 512 formed on the end surface 332b21 on the distal end side of the fixed iron core 332 and forming the second throttle. ..
  • valve body 311 and the fixed iron core 332 are joined, it is not necessary to align them in the circumferential direction, so that the assembling property is improved as compared with the first embodiment and the second embodiment. To do.
  • FIG. 8 is a cross-sectional view of a main part showing a fourth embodiment of the control valve 300.
  • the same reference numerals are used for the elements common to the first to third embodiments.
  • configurations different from those of the first to third embodiments will be mainly described.
  • the vicinity of the bottom surface of the first fitting hole 314 of the valve body 311 projects inward from the inner side surface and is parallel to the bottom surface of the first fitting hole 314.
  • a step surface 521 is provided over the entire circumference.
  • the first groove portion 402 is not formed on the end surface 332b21 on the tip end side of the fixed iron core 332.
  • the end surface 332b21 on the tip end side of the fixed iron core 332 comes into contact with the stepped surface 521, and the bottom surface of the first fitting hole 314 and the tip end side of the fixed iron core 332
  • a minute gap G is formed between the end face 332b21 and the end surface 332b21.
  • the minute gap G is set to form a passage having a cross-sectional area sufficiently smaller than the cross-sectional area of the valve hole 315, and is between the valve chamber 336 and the other end of the fourth communication hole 401.
  • the first throttle is provided in the above and communicates with the valve chamber 336 and the other end of the fourth communication hole 401.
  • the fourth communication hole 401 formed in the valve body 311 is formed between the bottom surface of the first fitting hole 314 and the end surface 332b21 on the tip end side of the fixed iron core 332.
  • a seventh communication passage 400 as the bypass passage is formed by the minute gap G constituting one diaphragm.
  • FIG. 9 is a cross-sectional view of a main part showing the fifth embodiment of the control valve 300.
  • the same reference numerals are used for the elements common to the first to fourth embodiments.
  • configurations different from those of the first to fourth embodiments will be mainly described.
  • the fourth communication hole 401 is formed at a position closer to the valve hole 315 than in the first embodiment, and the tip side of the fixed iron core 332.
  • the first groove portion 402 is not formed in the end surface 332b21 of the above.
  • the end face 332b21 on the tip end side of the fixed iron core 332 partially closes the other end (that is, the opening on the rear end side) of the fourth communication hole 401.
  • the non-occluded portion N at the other end of the fourth communication hole 401 in which the end surface 332b21 on the distal end side of the fixed iron core 332 does not block opens into the valve chamber 336 and has a cross-sectional area sufficiently smaller than the cross-sectional area of the valve hole 315. It is set to have. That is, the non-blocking portion N at the other end of the fourth communication hole 401 constitutes a "throttle".
  • a seventh communication passage 400 that communicates the second communication hole 317 in the discharge chamber pressure region and the valve chamber 336 in the crank chamber pressure region is formed by the fourth communication hole 401.
  • FIG. 10 is a cross-sectional view of a main part showing the sixth embodiment of the control valve 300.
  • the same reference numerals are used for the elements common to the first to fifth embodiments.
  • configurations different from those of the first to fifth embodiments will be mainly described.
  • the eighth communication passage 410 that communicates the second communication hole 317 in the discharge chamber pressure region and the third space S3 in the crank chamber pressure region like the valve chamber 336 is said. It is provided as a bypass passage.
  • the fixed iron core 332 has a notch in which the peripheral edge portion of the end surface 332b21 on the distal end side is cut out with a predetermined width over the entire circumference instead of the first groove portion 402. It has a portion 511 and a third groove portion 531 formed on the outer peripheral surface of the protruding portion 332b2.
  • the third groove portion 531 extends from the notch portion 511 to the vicinity of the third communication hole 332b23 in the length direction of the fixed iron core 332.
  • the third groove portion 531 has a cross-sectional area smaller than the cross-sectional area of the fourth communication hole 401, and more specifically, a cross-sectional area sufficiently smaller than the cross-sectional area of the valve hole 315.
  • the valve body 311 and the fixed iron core 332 are joined, that is, the portion 332b22 on the tip end side of the fixed iron core 332 is fitted into the first fitting hole 314, and the bottom surface of the first fitting hole 314 is fitted.
  • an annular passage 513 communicating with the other end of the fourth communication hole 401 is formed.
  • the valve body 311 and the fixed iron core 332 are joined, that is, the portion 332b22 on the tip end side of the fixed iron core 332 is fitted into the first fitting hole 314, and the bottom surface of the first fitting hole 314 is fitted.
  • the end surface 332b21 on the tip end side of the fixed iron core 332 comes into contact with the diaphragm, a diaphragm provided between the third space S3 and the annular passage 513 and communicating the third space S3 and the annular passage 513 (hereinafter, "third”). It is called “aperture").
  • the eighth groove 410 formed as the bypass passage is formed by the third groove portion 531 formed on the side surface of the protruding portion 332b2 of the fixed iron core 332 and forming the third throttle.
  • the outer peripheral surface of the protruding portion 332b2 corresponds to the "fitting portion".
  • a spiral groove portion 532 may be formed on the side surface of the protruding portion 332b2 of the fixed iron core 332 instead of the third groove portion 531.
  • the spiral groove portion 532 extends spirally from the notch portion 511 to the vicinity of the third communication hole 332b23 on the side surface of the protruding portion 332b2.
  • the spiral groove portion 532 has a cross-sectional area smaller than the cross-sectional area of the fourth communication hole 401, and more specifically, a cross-sectional area sufficiently smaller than the cross-sectional area of the valve hole 315. Then, in the spiral groove portion 532, the valve body 311 and the fixed iron core 332 are joined (the portion 332b22 on the tip end side of the fixed iron core 332 is fitted to the first fitting hole 314), and the first fitting hole 314 When the end surface 332b21 on the tip end side of the fixed iron core 332 comes into contact with the bottom surface, the third throttle provided between the third space S3 and the annular passage 513 and communicating the third space S3 and the annular passage 513 is provided. Constitute.
  • FIG. 12 is a cross-sectional view of a main part of the control valve 300 according to the seventh embodiment.
  • the same reference numerals are used for the elements common to the first to sixth embodiments.
  • configurations different from those of the first to sixth embodiments will be mainly described.
  • the second communication hole 317 in the discharge chamber pressure region and the crank chamber pressure region are provided as the bypass passage for bypassing the valve hole 315 and allowing the refrigerant to flow to the crank chamber 140.
  • the 7th communication passage 400 that communicates with the valve chamber 336, or the 8th communication passage 410 that communicates the second communication hole 317 in the discharge chamber pressure region and the third space S3 in the crank chamber pressure region is controlled. It is provided in the valve 300.
  • a ninth passage 420 that connects the pressure sensitive chamber 313 in the suction chamber pressure region and the valve chamber 336 in the crank chamber pressure region is provided in the control valve 300. There is.
  • the ninth passage 420 constitutes a part of a passage (hereinafter referred to as “second discharge passage”) for discharging the refrigerant in the crank chamber 140 to the suction chamber 141.
  • the ninth passage 420 is formed as follows.
  • the valve body 311 has a pressure sensitive chamber 313 instead of the fourth communication hole 401 that communicates the first fitting hole 314 and the second communication hole 317.
  • a sixth communication hole 541 that communicates with the first fitting hole 314 is provided. Specifically, one end (tip side) of the sixth communication hole 541 opens into the pressure sensitive chamber 313, and the other end (rear end side) of the sixth communication hole 541 is the peripheral edge of the bottom surface of the first fitting hole 314. It opens in the vicinity.
  • the sixth communication hole 541 is formed as a hole having a size and shape that can be easily processed. Preferably, like the fourth communication hole 401, it is formed as a circular hole having a diameter of 1 mm or more and a cross-sectional area smaller than the cross-sectional area of the valve hole 315.
  • a notch portion 511 in which the peripheral edge portion of the end surface 332b21 on the tip side is cut out with a predetermined width over the entire circumference and an end surface 332b21 on the tip side (notch portion 511) are provided. It has a fourth groove portion 542 formed in a portion other than the above portion).
  • the fourth groove portion 542 extends in the radial direction and communicates with the internal space of the protruding portion 332b2 of the large diameter portion 332b and the cutout portion 511 (a space formed by cutting out the peripheral edge portion of the end surface 332b21 on the distal end side).
  • the fourth groove portion 542 has a cross-sectional area smaller than the cross-sectional area of the sixth communication hole 541, preferably a cross-sectional area smaller than the cross-sectional area of the throttle hole 103c constituting the discharge passage 146.
  • valve body 311 and the fixed iron core 332 are joined to the fourth groove portion 542, that is, the portion 332b22 on the tip end side of the fixed iron core 332 is fitted into the first fitting hole 314.
  • the valve chamber 336 and the annular passage 513 are provided between the valve chamber 336 and the annular passage 513.
  • the second diaphragm that communicates with the above is configured.
  • the sixth communication hole 541 formed in the valve body 311 and the notch 511 of the end surface 332b21 on the tip end side of the fixed iron core 332 form the peripheral edge of the bottom surface of the first fitting hole 314.
  • the ninth communication that forms a part of the second discharge passage by the formed annular passage 513 and the fourth groove portion 542 formed on the end surface 332b21 on the tip end side of the fixed iron core 332 and forming the second throttle.
  • a passage 420 is formed.
  • the seventh embodiment it is possible to form the ninth passage 420 forming a part of the second discharge passage without using a special tool or special equipment, and it is possible to form the ninth passage 420 by one communication hole. Compared with the case of forming the ninth passage 420, the cost for forming the seventh passage 400, and by extension, the cost of the control valve 300 is reduced.
  • the control valve 300 according to the seventh embodiment has a configuration corresponding to the third embodiment when the bypass passage is provided inside. However, it is not limited to this.
  • the control valve 300 has a configuration corresponding to the first, second to sixth embodiments in the case where the communication passage forming a part of the second discharge passage is provided inside and the bypass passage is provided inside. May have. That is, a communication passage connecting the pressure-sensitive chamber 313 in the suction chamber pressure region and the valve chamber 336 in the crank chamber pressure region, or the pressure-sensitive chamber 313 and the crank chamber pressure region in the suction chamber pressure region.
  • a communication passage communicating with the third space S3 in the control valve 300 may be provided in the control valve 300.
  • valve body 555 is formed by joining the valve seat forming member 553 having the valve hole 551 and the valve seat 552 and the valve body 554.
  • the present invention may be applied to a control valve of the type in which the valve chamber 556 to be accommodated is partitioned.
  • the valve seat forming member 555 is fitted into the fitting hole 554a formed in the valve body 554.
  • the valve body 555 moves in the direction of the arrow in the drawing to open and close the valve hole 551.
  • the valve chamber 556 belongs to the crank chamber pressure region, and the space on the side opposite to the valve chamber 556 across the valve hole 551 belongs to the discharge chamber pressure region.
  • the communication hole 557 formed in the valve seat forming member 553 and the groove portion 558 formed in the bottom surface of the fitting hole 554a of the valve body 554 form the communication passage as the bypass passage.
  • the groove portion 558 constitutes a throttle that communicates the valve chamber 556 with the opening of the communication hole 557 on the valve chamber 556 side when the valve seat forming member 555 and the valve body 554 are joined.
  • valve body 563 having the valve hole 561 and the valve seat 562 and the bottomed cylindrical member 564 are joined to form a partition for the valve chamber 566 accommodating the valve body 565.
  • the present invention may be applied to a control valve of the type to be used.
  • the bottomed cylindrical member 564 is fitted into a fitting hole 563a whose opening side portion is formed in the valve body 563.
  • the valve body 565 moves in the direction of the arrow in the drawing to open and close the valve hole 561. Further, the valve body 565 is urged in the valve closing direction by the urging member 567.
  • the valve chamber 566 communicates with the discharge chamber via the communication port 564a and the filter F, and belongs to the discharge chamber pressure region.
  • the passage portion 568 on the side opposite to the valve chamber 566 across the valve hole 561 belongs to the crank chamber pressure region. Then, a communication hole 569 formed in parallel with the valve hole 561 in the valve body 563 and a groove portion 570 formed in the opening end surface of the bottomed cylindrical member 564 form a communication passage as the bypass passage.
  • the groove portion 570 has a cross-sectional area smaller than the cross-sectional area of the communication hole 569, more specifically, a cross-sectional area sufficiently smaller than the cross-sectional area of the valve hole 561, and the valve body 563 and the bottomed cylindrical member 564 When joined, it constitutes a throttle that communicates the valve chamber 566 with the opening of the communication hole 569 on the valve chamber 566 side.
  • variable capacitance compressor 101a ... cylinder bore, 111 ... swash plate, 136 ... piston, 140 ... crank chamber, 141 ... suction chamber, 142 ... discharge chamber, 145 ... supply passage, 300 ... control valve, 311 ... valve body ( 1st member), 313 ... Pressure sensitive chamber, 315 ... Valve hole, 320 ... Pressure sensitive device, 331 ... Solenoid housing, 332 ... Fixed iron core (2nd member), 333 ... Movable iron core, 335 ... Coil assembly, 336 ... Valve chamber, 400 ... 7th passage, 410 ... 8th passage, 420 ... 9th passage, 401 ... 4th passage, 402 ...

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
  • Compressor (AREA)
  • Valve Housings (AREA)
  • Lift Valve (AREA)
  • Details Of Valves (AREA)
PCT/JP2020/027782 2019-07-24 2020-07-17 可変容量圧縮機の制御弁 WO2021015116A1 (ja)

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JP4118587B2 (ja) * 2002-04-09 2008-07-16 サンデン株式会社 可変容量圧縮機
JP2004137980A (ja) * 2002-10-18 2004-05-13 Tgk Co Ltd 可変容量圧縮機用容量制御弁
JP4316955B2 (ja) * 2003-08-11 2009-08-19 イーグル工業株式会社 容量制御弁
JP2018021646A (ja) * 2016-08-05 2018-02-08 株式会社鷺宮製作所 感圧制御弁
JP7007299B2 (ja) * 2016-12-28 2022-01-24 イーグル工業株式会社 容量制御弁

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JP2008184926A (ja) * 2007-01-29 2008-08-14 Sanden Corp 往復動圧縮機
JP2016014334A (ja) * 2014-07-01 2016-01-28 株式会社テージーケー 可変容量圧縮機用制御弁
WO2019097841A1 (ja) * 2017-11-17 2019-05-23 サンデン・オートモーティブコンポーネント株式会社 クラッチ付き斜板式可変容量圧縮機の容量制御弁

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